A set of data is collected from a simple circuit with a 20 Ω resistor and is represented in the table.

The current at 5.0 V is
A.

The current at 15 V is
A.

A. Recall Ohm's Law: V = IR

If V = 45 volts, and I = 5 amps, the R = V/I = 45V/5A = 9Ω

B. We know the potential difference and the resistance, both of which have good units. All we have to do is plug the known values into the equation and solve for the current:

I=15V9Ω

Thus, the electric current is: 1.67A

.25

.75

Explanation:

edge

the total distance traveled by the car is

30km + 49km = 79 km .

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west